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Patterns or Fantasies?

Patterns or Fantasies?

(p.3) Chapter One Patterns or Fantasies?
Patterns In Nature
James G. SandersonStuart L. Pimm
University of Chicago Press

This book is about the identification and interpretation of nature’s large-scale patterns of species co-occurrence and what we can deduce from them about how nature works. Surely, the earliest experiences we have as naturalists are putting names to the species we see. Other groups of species are difficult and the field guides help by providing maps adjacent to the illustrations, for many similar species live in different places. So, geographical range helps—and often helps a lot. We ask:do similar species avoid each other, perhaps because mutual competition makes it difficult for them to coexist in the same place? This may be a profoundly interesting pattern, but it also may be an illusion. How do we decide?

Keywords:   assembly rule, checkerboard, community, competition, food web, gradient, island, null model, pattern, random

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